Thank you for the reply Phil. Unfortunately that didn't work, I get the following message: root@Wheal-Peevor:~# mdadm --run /dev/md126 mdadm: failed to start array /dev/md126: Input/output error Thanks Peter On 30 March 2016 at 23:17, Phil Turmel <philip@xxxxxxxxxx> wrote: > On 03/30/2016 05:19 PM, Peter Knight wrote: >> Hi, >> >> I hope someone can explain what is going on and hopefully help me >> recover my data. > >> What is causing this? and how can I get it reassembled so I can read the data? > > When mdadm assembles an array during boot that has fewer devices than > when it was last shut down (cleanly), it generally declines to start it. > > Probably, all you need is: > > mdadm --run /dev/md126 > > { --detail may not be accurate on an inactive device. The member > --examine data is trustworthy. } > > Phil -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html